RDMA/rxe: Make tasks schedule each other

Replace rxe_run_task() by rxe_sched_task() when tasks call each other.
These are not performance critical and mainly involve error paths but they
run the risk of causing deadlocks.

Link: https://lore.kernel.org/r/20230304174533.11296-8-rpearsonhpe@gmail.comSigned-off-by: Ian Ziemba <ian.ziemba@hpe.com>
Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/sw/rxe/rxe_comp.c

@@ -322,7 +322,7 @@ static inline enum comp_state check_ack(struct rxe_qp *qp,
 					qp->comp.psn = pkt->psn;
 					if (qp->req.wait_psn) {
 						qp->req.wait_psn = 0;
-						rxe_run_task(&qp->req.task);
+						rxe_sched_task(&qp->req.task);
 					}
 				}
 				return COMPST_ERROR_RETRY;
@@ -473,7 +473,7 @@ static void do_complete(struct rxe_qp *qp, struct rxe_send_wqe *wqe)
 	 */
 	if (qp->req.wait_fence) {
 		qp->req.wait_fence = 0;
-		rxe_run_task(&qp->req.task);
+		rxe_sched_task(&qp->req.task);
 	}
 }
 
@@ -487,7 +487,7 @@ static inline enum comp_state complete_ack(struct rxe_qp *qp,
 		if (qp->req.need_rd_atomic) {
 			qp->comp.timeout_retry = 0;
 			qp->req.need_rd_atomic = 0;
-			rxe_run_task(&qp->req.task);
+			rxe_sched_task(&qp->req.task);
 		}
 	}
 
@@ -767,7 +767,7 @@ int rxe_completer(struct rxe_qp *qp)
 							RXE_CNT_COMP_RETRY);
 					qp->req.need_retry = 1;
 					qp->comp.started_retry = 1;
-					rxe_run_task(&qp->req.task);
+					rxe_sched_task(&qp->req.task);
 				}
 				goto done;
 

drivers/infiniband/sw/rxe/rxe_req.c

@@ -753,7 +753,7 @@ int rxe_requester(struct rxe_qp *qp)
 						       qp->req.wqe_index);
 			wqe->state = wqe_state_done;
 			wqe->status = IB_WC_SUCCESS;
-			rxe_run_task(&qp->comp.task);
+			rxe_sched_task(&qp->comp.task);
 			goto done;
 		}
 		payload = mtu;
@@ -837,7 +837,7 @@ int rxe_requester(struct rxe_qp *qp)
 	qp->req.wqe_index = queue_next_index(qp->sq.queue, qp->req.wqe_index);
 	wqe->state = wqe_state_error;
 	qp->req.state = QP_STATE_ERROR;
-	rxe_run_task(&qp->comp.task);
+	rxe_sched_task(&qp->comp.task);
 exit:
 	ret = -EAGAIN;
 out: